Qubit ZooDual-end tunnelling study of an epitaxial InAs/Al planar Josephson junction. In selected field and gate ranges the superconducting gap closes and reopens while a zero-bias peak appears, with imperfect end-to-end peak correlation attributed to disorder and probe coupling.
Key Results
- 100 nm-wide, 1.6 μm-long phase-biased weak link with quantum-point-contact probes at both ends.
- Gap closing and reopening generally correlated between the two ends.
- Zero-bias-peak visibility differed between ends, limiting a uniquely topological interpretation.
Links
- Journal: Physical Review B
- arXiv: 2201.03453